Twist drill bits DIN338 DIN340 DIN1869 High Speed Steel or HSSCobalt. Surface treatments:Bright finish,Black Oxide,Ti coating High speed steel twist drill bits.Standards: DIN338,DIN340,DIN1869.Material: W4,W9,M2Production methods: rolled forged,milled,fully ground.Surface treatments:Bright finish,Black Oxide,Ti coating. Double end drill bits available.. High Speed Steel Twist Drill Bit